给定一个字符串,我们需要找到获得相同字符串所需的最小转数
如果输入字符串为“ bbbbb”,则至少需要旋转一圈
1. Initialize result = 0 2. Make a temporary string equals to original string concatenated with itself. 3. Take the substring of temporary string of size same as original string starting from second character i.e. index 1 4. Increment the counter 5. Check whether the substring becomes equal to original string. If yes, then break the loop. Else go to step 2 and repeat it from the next index
#include <bits/stdc++.h>
using namespace std;
int getRotationCount(string str) {
   string temp = str + str;
   int n = str.length();
   for (int i = 1; i <= n; ++i) {
      string sub = temp.substr(i, str.size());
         if (str == sub) {
            return i;
         }
   }
   return n;
}
int main() {
   string str = "bbbbb";
   cout << "Rotation count = " << getRotationCount(str) <<
   endl;
   return 0;
}当您编译并执行上述程序时。它产生以下输出
输出结果
Rotation count = 1